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SY89833L

Micrel, Inc.

M9999-082407

hbwhelp@micrel.com or (408) 955-1690

August 2007

DESCRIPTION

■ Guaranteed AC performance over temperature

and voltage:

• DC-to > 2GHz throughput

• <600ps propagation delay (IN-to-Q)

• <20ps within-device skew

• <190ps rise/fall times

■ Ultra-low jitter design

• <1ps

• <10ps

• <1ps

• <10ps

■ Unique input termination and VT pin accepts DC-

and AC-coupled inputs

■ High-speed LVDS outputs

■ 3.3V power supply operation

FEATURES

3.3V ULTRA-PRECISION 1:4 LVDS

FANOUT BUFFER/TRANSLATOR

WITH INTERNAL TERMINATION

SY89833L

APPLICATIONS

■ Processor clock distribution

■ SONET clock distribution

■ Fibre Channel clock distribution

■ Gigabit Ethernet clock distribution

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The SY89833L is a 3.3V, high-speed 2GHz differential

Low Voltage Differential Swing (LVDS) 1:4 fanout buffer

optimized for ultra-low skew applications. Within device skew

is guaranteed to be less than 20ps over supply voltage and

temperature.

The differential input buffer has a unique internal

termination design that allows access to the termination

network through a VT pin. This feature allows the device to

easily interface to different logic standards. A VREF-AC

reference is included for AC-coupled applications.

The SY89833L is part of Micrel’s high-speed clock

synchronization family. For 2.5V applications, the SY89832U

provides similar functionality while operating from a 2.5V

±5% supply. For applications that require a different I/O

combination, consult the Micrel website at: www.micrel.com,

and choose from a comprehensive product line of high-

speed, low-skew fanout buffers, translators and clock

generators.

FUNCTIONAL BLOCK DIAGRAM

TYPICAL PERFORMANCE

Precision Edge is a registered trademark of Micrel, Inc.

MicroLeadFrame and MLF are registered trademarks of Amkor Technology, Inc.

622MHz Output

TIME (321.9ps/div.)

IN

/IN

DQ

Q3

/Q3

Q2

/Q2

Q1

/Q1

Q0

/Q0

EN

(LVTTL/CMOS)

VT

50Ω

50Ω

VREF-AC

1:4